Pencil sharpener



' Jan. 26, 1932. G. w. RAPPOLD PENG IL SHARPENER Filed June 12, 1950 v2 Sheets-Sheet l INVENTOR Gear a W 52 0010 WHORNE Y Jan. 26, 1932. G. w. RAPPOLD PENCIL SHARPENER 2 Sheets-Sheet 2 Filed June 12, 1950 INVENTOR Gee/f9: WBagw/d a i L BY MQQWM A TTORNEY Patented Jan. 26,1932

GEORGE w. mrronn, or w se-Emu, New Yomr PENCIL smmrnnnn Application filed J'une12,

This invention relates to new and useful improvements in a pencil sharpener.

The invention has. for an object the provisionof a device of the class mentioned which .3 is of simple durable construction, dependable in use and efficient in action, and which can be manufactured and sold at a reasonable cost.

For further comprehension of the inveni -1" tion,and of the objects and advantages vthere of, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of .the invention are more par- 2-5 ticularly set forth. y

In the accompanying drawings forming a material part of this disclosure r Fig. 1 is a plan view of a device constructed according to this invention.

Fig. 2 is a vertical sectional the line 2-2 of Fig. 1.

Fig. 3 is a transverse vertical sectional view taken on the line 33 of Fig. 1.

Fig. 4: is a horizontal sectional view taken 7 on the line k t of Fig. 2.

view taken on Fig. 5 is a side elevational view of the device seen from the'left hand side of Fig. 3.

Fig. 6 is a fragmentary enlarged detailed sectional view of aportion of Fig. 3.

Fig. 7 is a bottom V16 W o Fig. 8 1s a fragmentary sectional view taken on the line8-8 of Fig. 6'.

Fig. 9 is a perspective view of one of the blade holders per se. V

Fig. 10 is an enlarged fragmentary sectional view taken on the line 1()10 of Fig. 9.

Fig. 11 is an enlarged fragmentary sectional view taken on the line 11-11 of Fig. 2.

Fig. 12 is a perspective view of a knife carriage used in the device.

The pencil sharpener comprises a casing 10 having openings 11 and opposite vertical sides 12, a knife carriage 13 vertically slid- F ably mounted in the casing 10, a vertical knife guide 14 mounted in the casing 10,

1930. Serial no. 460,585.

means for manually adjusting said guide, a pencil guide or holder 15 rotatively mounted in the casing, means for slightly turning said pencil guide upon each cycle of cuttingknives for sharpening a pencil inserted in the guide, knife holders 16 pivotally mounted insaid knife carriage 13 and having handle portions 17 projecting through said openings 11 in'the casing for depression to pivot knives in the holders against and down along said guide 1 1, and means for automatically raising said knife carriage 13 after each depression.

The casing 10 is shown of two sections, namely a large base section-18 'attaehedto an upper section 19. A door 20 is pivotally 50 arranged in thelower section and a coaxial spring 21 is arranged upon the pivot point of the door for normally urging it'closed. The door is shown having a handle 22 for its manual opening. Dot anddash lines 23 in Fig. 3 indicate a partially opened position ofthe door. Shavings within the casing can be removed from this, door. I

A knife carriage '13 made from sheet metal and has a pluralityof vertical sides 2 1 and 25 and a top side 26. The vertical corners ofthe sides 24;: and 25 are cut out as indicated by reference numeral '27. Bottom lugs 28 are formed upon the sides 25 andex tend beneath the cut out 27.. Springs 29 are attached at one of their ends upon the lugs 28 and at their other ends to the top of the casing 10. These springs constitutethe means for automatically raising said knife carriage 13 after'eaclr depression. A pair of opposite horizontal top edges of the knife carriage 13 are cut out as indicated by reference numeral 30. These cutouts allow the passage of the knife holders 16 so that the handle 7 portions extend therefrom, while the other 35 portions are disposed wit-hinthe carriage. A slidable mounting of-the knife carriage. is accomplished by the sides 24 and 25 being in slidable relation with the inner sides of the top section19 of the casing.

PATENT. [on-"ice L comprises a plurality of teeth The vertical knife guide 14 comprises a pair of vertical rods 31 spaced from each other and arranged upon opposite sides of the holder 15. The top ends of these rods eK- tend from the top of the casing 10. The top portions of the rods 31 are circular in horizontal cross section as may be seen from an inspection of Fig. 11 while the lower per tions are tapered and of elliptical shape in dicated by the dotted lines in this figure. The lowered pointed ends of the rods 31 rest upon a block 32 attached within the casing 10. This block extends transversely across the bottom section 18 of the casing so as to be located directly beneaththe pencil holder 15. A pencil inserted through the holder rests upon this block as clearly illustrated in Fig. 2. The means for manually ing the knife guide 14 comprises radial arms 33 attached upon the top extended ends of each of the rods 31 and connected to each other by a connecting rod 34. The poiins of connection between the rod 34 and the arms 33 are pivotal so that the rod may be moved for simultaneously turning both of the arms The pencil guide '15 comprises a tube 35 rotatively mounted in a collar 36. This collar is threadedly engaged in the top of the casing and has a top edge at right angles to the main portion of the collar. The top of the tube is bent outwards so that it has a portion 37 resting against the top edge of the collar 36. A washer 38 is disposed immedi ately below the top of the casing 10 and upon the tube 35 and a ring 39 is positioned below the washer and attached upon the tube by a rivet40. The lower end of the tube 35 is provided with a plurality of curved lingers 41. Intermediate. its ends the tube 35 is formed with a plurality of curved impressed portions 42 for acting against an inserted pencil and holding the pencil against relative rotations to the tube. v

The means for slightly turning said pencil guide upon each cycle of the cutting knives 43 projecting from the bottom of the ring 39 and engageable by a pair of fingers 44 out out from the top portion 26' of the knife carriage 13. The fingers 44 have opposed free ends extended upwards above the top 26 and resilient so that as the carriage 13 moves to the rai ed position, these free ends engage a pair of the teeth 43 and rotate the tube 35 as the can riage 13 completes is upstroke. A inger 45 is rigidly attached upon the inner side of the top portlon of the casing 10 and has a flat portion acting against the edge of the ring 39 for normally frictionally holding the tube against free rotation.

7 Each knife holder 16 has a substantially vertical portion 46 integral with the horizontal handle portion 17. The top surface of the handle portion is nurled as indicated on the drawings. The junction between the the second cut;

portions 17 and 46 is curved and turned around upon a pin 47. This pin has its free ends attached through the slots 27 of the knife carriage 13. Springs 48 are attached upon the pin 47 and act against the portion 46 for normally resiliently preventing free turning of the pin 47 outside of certain limits. The portion 46 of the knife holder is formed with a plurality of bent fingers 49 along the bottom edge and other bent lingers 50 on the sides for engaging a razor blade and holding the blade in place. Between the bottom fingers 49 there are spaces 51 so that a portion of the blade is exposed and may act against the guides 14 and against a pencil inserted in the pencil holder. The lower part of the portion 46 is slightly offset from the other portion as indicated by reference numeral 52 novidin an offset ed e for 1'OCGl'J ing the top edge of an inserted blade. On the drawings the bladesare indicated by reference numerals They are shown inserted ithin the knife holders. The pencil on the drawings is indicated by reference numeral 54.

The operation of the device may be traced by assuming the parts in the position as illustrated in F 3. The blade holders 16 maybe manually moved downwards by pressing downwards upon the handle portion 17. Downward pressure upon the handle portions causes the knife holders to tend to pivot around the pins 47 and this urges the blades 53 against the knife guides 14. Downward pressure upon the handle portion 17 moves the knife carriage 13 downwards and the blades cut off opposite portions of the penoil 54 as directed by the tapered portions of the rods 31 of the knife guides. After complete depression the handles 17 are released so that the s pri s 29 may return the knife carriago to its 1': sed position.

As the knife carriage reaches its raised position the fingers 44 act against the teeth of the ring 39 so as to slightly rotate the tune 35 and consequently turn the pencil 54 to a new position. Then the connecting rod is slightly moved so as to move the knife guide 14 toa new position. The new position referred to is a slight rotation of the rods 31"so that'the major axis of the elliptical tapered portions of the rods move and allow another out upon the pencil 54. Then the handle portions 17 are again depressed for taking Tie operation is repeated until the pencil has been completely pointed.

It is to be understood that the guides 14 may also be set to correspond with a definite cutting shape of the pencil and left in the set position throughout the operation of sharpening.

While I have shown and described the preferrer. embodiment of my invention, it is to be understood that I do not limit myself to the precise construction herein disclosed and the right is reserved to all changes and modificationscomlng within'the scope of themv'ention as defined in the appended claims;

llavlngthus described my invention, What I claim as new, and desire tosecure by United StatesLetters Patent is 1. A pencil sharpener, comprising acasing having openings on opposite vertical sides, a knife" carriage Vertically slidably mounted in said casing, a vertical knife guide mounted in' said casing, means forl'manuallyadjusting said guid e,a pencil guide rotatively mounted in said casing, means for slightlyturning said pencll guide upon each cycle of cutting 'kDlVGS for sharpening a pencil inserted in said guide, knife holders pivotally mounted in sa1d knife carriage, and havmg handle portions projecting through said openings in the casing for depression toplvot kn ves 1n the holders against and down along sa1d knife guide, and means for automatically raising said knife carnage after each depression.

2. A pencil sharpener, comprising a casing having openings on opposite vertical sides, a

knife carriage vertically slidably mounted in saidcasing, a vertical knife guide mounted 1n said casing, means for manually adjusting said guide, a pencil guide rotatively'mounted in said casing, means for slightly turning said pencil guide upon each cycleof cutting knives for sharpening a pencil inserted in said guide, knife holders pivotally mounted in said'knife carriage and having handle portions projecting through said openings in the casing for depression to pivot knives in the holders againstand down along said knife guide, and means for automatically raising said knife carriage after each depression, said knife carriage being of box-like construcportions projecting through said openings in, the caslng for ClQPIGSSlOlrt-OPlVOt knivesinthe holders against and down along said knife guide, and means for automatically raising said knife carriage after each depression, said knife carriage being of box-like construction having vertical sides and a top, the vertical corners of said sides being cut out and lugs being arranged on the sides for con-- nection with one of the ends of a plurality of sprin attached at their other ends to the top of the casing and constituting said means for automatically raising said knife carriage after each depression.

4. A pencil sharpener, comprisinga casing having openings on' opposite vertical sides, a knife carriage vertically slidably mounted in said casing, averticalknife guide mounted in said casing, means for manually adjusting said guide, a pencil guiderotatively mounted in said casing, means for slightly turning said pencil guide upon each cycle of cutting knives for sharpening a pencil inserted in-said guide, knife holders pivotally mounted in said knife carriage and havlng handle portions projecting through said openings in the casing for depression to pivot knives in the holders against and down along sa1d knife guide, and means. for automatically raising said knife carriage after each clepression, said knifecarriage being of boxlike construction having vertical sides and a top, opposite topfcorner's of said vertical sides and the horizontal top being cut out for the passage of said knife holders so that the handle portions may extend through said openings and other portions be disposed Within said carriage.

5. A pencil sharpener,comprising a casing having openings on opposite vertical sides, a knife carriage vertically slidably mounted in said casing, a vertical knife guide mounted in said casing, a pencil guide rota- #5 H tively mounted in said casing, means for slightly turning sa1d pencil guide upon each cycle of cutting kmves for sharpening a pencil inserted in said guide, knife holders pivot'ally mounted in said knife carriage and having handle portions projecting through said openings in the casing for depression to pivot knives in the holders against and down along said knife guide, andmeans for automatically raising said knife carriage after each depression, said knife carriage consisting of a box-like construction having vertical sides and said sides being 1n slidable contact with the interior of the casing constitutin the slidable mounting.

6. pencil sharpener, comprising a casing having openings on opposite vertical sides, a knife carriage vertically slidably mounted in said casing, vertical'knife guide mounted in sa1d caslng, means for manually adjusting said guide,'a pencil guide rotatively mounted 1n sa1d casing, means for slightly turning said pencil guide upon' each cycle of cutting knives for sharpening a pencilin- 'serted in said guide,,knife holders pivotally mounted in said knife carriage and having handle portions projecting through said openings in the casing for depression to pivot knives in the'holders against and down along said knife guide, and means for automatically raising said knife carriage after each depression, said vertical knife guide comprising vertical rods arranged on opposite sides ofthe pencil holder and extended through the top of the casing and havingtapered lower ends of approximately elliptical shape and resting at the bottom upon a block attached Within said casing.

7. A pencil sharpener, comprising a casing having openings on opposite vertical sides, a knife carriage vertically slidably mounted in said casing, a vertical knife guide mounted in said casing, means for manually adjusting said guide, a pencil guide rotatively mounted in said casing, means for slightly turning said pencil guide upon each cycle of cutting knives for sharpening a pencil inserted in said guide, knife holderspivotally mounted in said knife carriage and having handle portions projecting through said openings in the casing for depression to pivot knives in the holders against and down along said knife guide, and means for automatically raising said knife carriage after each depression, said vertical knife guide comprising vertical rods arranged on opposite sides of the pencil guide and extended through the top of the casing and having tapered lower ends of approximately elliptical shaped and resting at the bottom upon a block attached *ithin said casing, said means for manually adjusting the knife guide comprising radial arms attached to the extended ends of said rods, and a connecting rod between said radial arms.

8. A pencil sharpener, comprising a casing having openings on opposite vertical sides, a knife carriage vertically slidably mounted in said casing, a vertical knife guide mounted in said casing, a pencil guide rotatively mounted in said casing, means for slightly turning said pencil guide upon each cycle of cutting knives for sharpening a pencil inserted in said guide, knife holders pivotally mounted in said knife carriage and having handle portions projecting through said openings in the casing for depression to pivot knives in the holders against and down along said knife guide, and means for automatically raising said knife carriage after each de pression, said pencil guide comprising a tube having its top end turned flat and rotatively supported in a collar attached within the top of the casing, a ring being attached upon said tube within said casing, and a Washer being disposed between said ring and the inside of the casing.

9. A pencil sharpener, comprising a casing having openings on opposite vertical sides, a knife carriage vertically slidably mounted in said casing, a vertical knife guide mounted in said casing, a pencil guide rotatively mounted in said casing, means for slightly turning said pencil guide upon each cycle of cutting knives for sharpening a pencil in sorted in said guide, knife holders pivotally mounted in said knife carriage and having handle portions projecting through said openings in the casing for depression to pivot knives in the holders against and down along said knife guid and means for automatically raising said knife carriage after each depression, each of said knife holders having a substantially vertical portion integral with said handle poition and extended around a pin fixed within said knife carriage, and fingers from said substantially vertical portions for engaging and holding blades in place.

10. A pencil sharpener, comprising a casing having openings on opposite vertical sides, a knife carriage vertically slidably mounted in said casing, a vertical knife guide mounted in said casing, a pencil guide rotatively mounted in said casing, means for slightly turning said pencil guide upon each cycle of cutting knives for sharpening a pencil inserted in said guide, knife holders pivotally mounted in said knife carria and having handle portions projecting through said openings in the casing for depression to pivot knives in the holders against and down along said knife guide, and means for automatically raising said knife carriage after each depression, each of said knife holders having a substantially vertical portion integral with said handle portion and extended around a pin fixed within said knife carriage, fingers from said substantially vertical portions for engaging and holding blades in place, and said substantially vertical portions formed with spaces between the bot-- tom fingers for exposing the blades so that they may act against a pencil inserted in the pencil guide.

11. A pencil sharpener, comprising a casing having openings on opposite vertical sides, a knife carriage vertically slidably mounted in s d casing, a vertical knife guide mounted in i i casin a pencil guide rotatively mounted in said casing, means for slightly turning said pencil guide upon each cycle of cutting knives for sharpening a pencil inserted in said guide, knife holders pivotally mounted in said knife carria and having handle portions projecting through said openings in the casing for depression to pivot knives in the holders against and down along said knife guide, and means for automatically raising said knife carriage after each depression, each of said knife holders having a substantially vertical portion integral with said handle portion and extended around a pin fixed within said knife carriage, fingers from said substantially vertical portions for engaging and holding blades in place. and a leaf spring attached on the said pin for normally resiliently hold ing said pin from turing outside of certain limits.

12. A pencil sharpener, comprising a casing having openings on opposite vertical sides, a plurality of longitudinally stationary vertical knife guides mounted in said casing, a pencil guide rotatively mounted in said casing, cutting knives for sharpening a pencil inserted in the pencil guide, means for sup porting said cutting knives comprising a knife carriage vertically slidably mounted in said casing and knife holders pivotally mounted in said knife carriage and having handle portions projecting through said openings in the casing for depression to pivot the knives in the holders against and down along said longitudinally stationary vertical knife guides, means for automatically raising said knife carriage after each depression, and means for slightly turning said pencil guide upon each cycle of the cutting knives.

In testimony whereof I have afliXed my signature. I

GEORGE W. RAPPOLD. 

